Blowpipe valve means



Dec. 7, 1943. j l A L.. w. YOUNGv 2,335,987

BLowPIPE VALVE MEANS f original Filed Deo. 31, 1957 F l G.| 124 3 INVENTOR LLOYD W. YOUNG ATTORNEY Patented Dec. 7, 1943 LowPIPE vALvE MEANS Lloyd W. Young, Scotch Plains, N. J., assignor, by

mesne assignments, to Union Carbide and Carbon Corporation,a corporation of New York Original application December 31, 1937, Serial No. 182,840, now Patent No. 2,249,338, dated July 15, 1941. Divided and this application November 23, 1940, Serial No. 366,827

7 claims. '(01. asl-164)* f This invention relates to bloWpipe valve means, and more particularly to cutting blowpipes which possess operating characteristics of the highest standard and yet are extremely light in weight, simple in construction, and less expensive to manufacture and to maintain in enicient operating condition than known blowpipes of similar characteristics.

An object of the invention is to provide a light weight blowpipe of simple construction having a small number of parts, and possessing operating characteristics of the highest standards. Another object is to provide a blowpipe having an improved cutting-oxygen supply-valve. A further object is to provide blowpipe cutting-oxygen supply-valve means of improved construction and operating characteristics.

The above and other objects and novel features of the invention will be apparent from the following description taken with the accompanying drawing, in which:

Fig. 1 is a broken sectional view of a cutting blowpipe embodying the principles of this invention;

Fig. 2 is a broken plan sectional View of aportion of the blowpipe shown in Fig. 1; and

Fig. 3 is a sectional view taken along line'v 3 3 of Fig. 1.

Referring to Figs. 1 to 3, inclusive, the principles of the invention are shown as applied to a cutting blowpipe comprising a handle H of substantially the same construction as the handle 4|) of the welding blowpipe of Fig. 4 of my app1ica-' tion, Serial No. 182,840, filed December 31,1193?, now Patent No,2,249,338, dated July 15, 1941, of which the present-application isa division. .The handle I-I surrounds an oxygen conduit Imi-and an acetylene conduit |22. The rear ends of'these conduits are connected to oxygen and acetylene hoses in the same manner that conduits 4I and y 42 of the blowpipe disclosed in such Fig. 4 are connected to their respective hoses.

The forward end of the acetylene lconduit |22 is connected to a mixer within the head N'; The forward end of the oxygen conduit terminates in a valve body M' rigidly secured to the forward end of handle H.

Valve body M' is adapted to contain a cutting oxygen valve assembly |24 and a preheat oxygenr valve |26. It is provided with a passage |28 opening into a cutting oxygen chamber |30, and having a branch passage |32 (see Fig. 2) opening into a preheatoxygen chamber |34. The bore forming chamber is counterbored and threaded to receive a bushingr |36. A channel |38 is provided at the bottom of the threaded counter-y bore and a iiexible diaphragm is positioned thereover. The diaphragm is securely seated at the external periphery of channel |38 by the bushing |36, and may be held in sealed relation with the inner periphery of channel |38 thus forming a valve for controlling the ow of cutting oxygen to channel |38. Seating of diaphragm |40 on'the seat between channel |38 and chamber |30 may be accomplished by a spring |42 Vwithin a chamber of bushing |36. The diaphragm |40 has a plane central surface portion facing and -Wholly exposed to the entire crosssectional area of the bore or inlet passage |30. A valve stem |44 is adapted to be positioned within spring |42, and is Provided at its inner end withY an integral disc between the inner end of spring |42 anddiaphragm |40, the integral disc being secured to diaphragm |40 in any suitable manner. The outer end of stem |44 extends through the head of bushing |36 and is attached to one end of a valve operating handle |46.V A plate |48 is positioned between the bodyM and a flange of bushing |36, upon which is mounted a pair of spaced ears |50 and |52 (see Fig. 3).

Y A spring-clip |54D substantiallyfencircles body M' and is positioned within a groove |55. The clip |54 includes a'pair of spaced parallel arm portions |55 extending above and along the top of body YM', whichY portions are nally bent at right angles Withrrespect to the respective arm portions, pass through theV ears |50, |52 and through aligned apertures inthe sides of the handle |40` thus forming trunnion's on which handle |46 is pivoted.` The handle |45 may be disassembled by simply squeezing together the paral-V lel arm portions |55 of the spring clip |54 until their bent end portions have been withdrawn from Yengagement with the aperturesrin handle Y'The handle '|45 is maintained in a position corresponding to vclosed lposition of diaphragm valve |40 by the action of the spring |42. Handle |45 may be held in a position corresponding to the open position of diaphragm |40 by a releasable snap connection. A knob |58 (see Figs'. 1 and 3)` is fixed to the under surface of handle |46 in position to cooperate with the forwardly extending parallel arms |55 of clip |54. The knob |58 is provided with ahead and neck portion, so arranged that pressure on the rear end oi handle |46 will cause the head'to pass vbetween the armsr |55 of clip |54 which arm portions then'enga'ge the neck portion and hold the handle in position to permit oxygen to force diaphragm valve |46 from its seat and pass into channel |38. The handle |46 may be snapped to closed position by pressure applied thereto forwardly of the pivot point, or ears |50, |52.

Referring to Fig. 2, the preheat chamber |34 is adapted to be closed by a valve |26. The forward end of the body M is provided with a relatively large bore |60, and a pair of passages |62, |64 are drilled from the bottom of bore |60 to the channel |38, and the chamber |34,respec tively. The cutting, and preheat oxygen are conducted to the head N by concentric conduits |14, 16 connected to the body M' within the bore 60, and to the head N' in a novel manner to be described.

The following parts will be described in the order of their assembly, beginning With the head N', which comprises a forward portion adapted to receive a tip T', and a rear portion to which the cutting and preheat oxygen conduits, and the acetylene conduit are connected. The head is provided with cutting-oxygen and fuel-gas passages |66 and |68 terminating respectively in chambers and |12. The fuel gas passage is counterbored to provide a mixing chamber |13 having a mixer |15 fixed therein which latter is connected to the restricted end of acetylene conduit |22.

The'passage |66 is counterbored to receive the concentric arrangement of the cutting and preheat oxygen conduits |14 and |16, respectively. A chamber |18 is formed within head N by drilling from the mouth of the counterbore of passage |66. The preheat oxygen conduit |16 is then soldered in place within chamber |18, and bent to pass concentrically out of the counterbore. The cutting oxygen conduit |14 is then slipped over conduit |16 and soldered in place within the counterbore of passage |66. Before assembling the mixer |55 within the mixing chamber |13, a passage |19 is drilled from the snap operated lever for operating said flexible mouth of the counterbore of passage |68 and through the conduit |16, thus establishing communication between chamber |18 and the mixing chamber |13.

A sleeve |80 is adapted to slide on the rear end of conduit |14 so that it willcomplete said conduit and permit the soldering of the rear end of conduit |14 to the body M' within bore |60 and at the outlet of passage |64. Sleeve |80 is then positioned so that its rear end is within bore |60 and it is finally soldered to the body M and conduit |14, respectively. I

From the foregoing it is apparent that the oxygen enters the blowpipe and passes through conduit |20 to passage |28 where it divides; the cutting oxygen continuing along passage |28 to chamber |30 past diaphragm valve |40 to passage |62, along the annular passage formed by conduits |14 and |16 through passage |66 in the head N' to chamber |10. The preheat oxygen branches off from passage |28 through passage |32 (see Fig. 2) to chamber |34, duct |64, conduit 14, cross passage |19 in head N', to the mixing chamber |13 where it is mixed with acetylene from conduit |22.

The form of the invention here described and illustrated in the accompanying drawing isdisclosed merely to indicate how the invention may be applied. Other forms, differing in detail but not in principle from those here shown and described, will, of course, suggest themselves to those skilled in the art.

diaphragm valve, the combination of a spring clip substantially surrounding said valve body and forming a pivot for said lever; and a knob associated with said lever for cooperation with said clip releasably to lock said lever in a predetermined position.

2. In a blowpipe as claimed in claim 1, wherein said Valve includes a spring adapted to urge said ilexible diaphragm valve into seating engagementwith a portion of said gas passage, and said knob cooperates with said spring clip releasably to lock said flexible diaphragm valve'in open position against the action of said spring.

3. A blowpipe valve means comprising, in combination, a body provided with a valve chamber having an vinlet passage surrounded by an annular valve seat, and an outlet passage leading from said chamber; an impervious resilient diaphragm valve movable against said `valve seat to control the flow of fluid'from said inlet to said outlet; and means for moving said diaphragm valve toward and away from said seat, including a lever and a spring clip secured to said valve body and also forming a pivot for said lever, said lever being provided with a knob adapted to engage said spring clip releasably to lock 'said lever in a predetermined position. Y

4. A blowpipe valve means as claimed in claim 3, including a valve stem one end of which is connected to said diaphragm valve and the other end of which is, connected to said lever, said knob cooperating with said spring clip releasably to lock said lever in position with said diaphragm valve spaced from saidvalve seat.

5. Blowpipe cutting-oxygen supply-valve means comprising, in combination, a body having an annular groove and a valve chamber provided with inlet and outlet passages, an impervious flexible diaphragm valve in said chamber for controlling the flow of cutting oxygen between said inlet and outlet passages, spring means normally urging said valve into one position, and means for flexing said valve into another position and temporarily locking it in such position against the force of said spring means comprising a handle connected to said valve and having a knob provided with a head and neck, anda spring clip substantially encircling said body within said annular groove, said clip including a pair of spaced parallel arms terminating in trunnions extending at right angles thereto, and means mounted on said body provided with ears through which said trunnions extend, said handle being pivoted to said trunnions, and the construction and arrangement being such that suflicient tilting pressure on said handle causes said head to snap between said arms Whichthen engage said neck to hold said handle ywith said valve Ilexed in such position.

' 6. Blowpipe cutting-oxygen supply-valve means comprising, in combination, a body having an annular groove and a valve chamberprovided with inlet and outlet passages, a valve in said chamber for controlling the flow of cutting oxygen between said inlet and outlet passages, means normally urging said valve into one position, and means for exing said valve into another position and temporarily locking it in such position against the force of said means comprising a handle connected to said valve and having a knob provided with a head and neck, and a clip substantially encircling said body within said annular groove, said clip including a pair of spaced parallel arms terminating in trunnions extending at right angles thereto, and means mounted on said body provided with ears through which said trunnions extend, said handle being pivoted to said trunnions, and the construction and arrangement being such that sufficient tilting pressure on said handle 4causes said head to snap between said arms which then engage said neck to hold said handle with said valve flexed in such position.

7. Blowpipe cutting-oxygen supply-valve means comprising, in combination, a body having an annular groove and a valve chamber provided with inlet and outlet passages, a valve in said chamber for controlling the flow of cutting oxygen between said inlet and outlet passages, means normally urging said valve into closed position, and means for flexing said valve into open position and temporarily locking it in open position against the force of said means comprising a handle connected to said valve and having a knob provided with a head and neck, and a cup substantially encircling said body within said annular groove, said clip including a pair of spaced parallel arms terminating in trunnions extending at right angles thereto, and means mounted on said body provided with ears through which said 15 trunnions extend, said handle being pivoted to said trunnions, and the construction and arrange ment being such that sufcient tilting pressure on said handle causes said head to snap between said arms which then engage said neck to hold said handle with said valve flexed in open position.

LLOYD W. YOUNG. 

